<!DOCTYPE html>
<html>
<head>
<title>Bug 1128787</title>
</head>
<body>
  <input type="button"/>
  <script>
    window.onload = function () {
        document.designMode = "on";
    }
    var input = document.getElementsByTagName("input")[0];
    input.focus();
    input.type = "text";
  </script>
</body>
</html>
